Buprenorphine UA Detection

[LongKissGoodNite]

So I have a UA coming up and I've been a bad boy. Not going into details lets just say it is my second UA for my sub program and having relapsed I don't think I will pass the test by the time I have to go in. I have an option to reschedule and an already legitimate reason why my script wont be out by now. So I am probably going to have to end up doing that. However while searching around on the net I found a suggestion by someone that got me thinking.

I know that these drug tests monitor for the metabolites of the drug in the urine. So just mixing the drug into the sample isnt going to cut it if you, for whatever reason, want to be positive. However, someone had said that they had tried getting synthetic urine and mixing in 1/8 of a pill and tested positive just fine. From wikipedia I know that buprenorphine is not a metabolite of itself, rather the metabolites are:

Originally Posted by wikipedia

Buprenorphine is metabolised by the liver, via the CYP3A4 isozyme of the cytochrome P450 enzyme system, into norbuprenorphine (by N-dealkylation), glucuronidation and other metabolites

So that said, mixing it probably isnt going to work. But on the off chance this bit of 'lore' I picked up has any truth to it, I'd thought I'd ask anyway. Has anyone had any experience doing this or pulling this off? Given my story is there any way to actually go as scheduled by maybe getting pre-contaminated urine? I'm not watched so using a substitute or adulterant is not an issue.

Thanks!